Detect Buildings and Roads from Ikonos and DEM Data with Definiens eCognition
Using high resolution remote sensing data such as IKONOS data makes it possible in principle to detect man-made features such as buildings and roads. However, due to the high spatial resolution of the IKONOS data, an automatic or semi-automatic detection of such features based only on their spectral entities can be difficult, especially in heterogeneous situations such as dense urban areas. Using a DEM and additional semantic information helps to detect them more adequately. When combining spectral and elevation data, significant elevation information for the objects in question and their spectral properties can be used to outline their shape and to classify them adequately with Definiens eCognition.